<template>
    <div>
        <!-- 面包屑导航区域 -->
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>商品列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片视图区域 -->
      <el-card>
            <el-row :gutter="20">
                <el-col :span="8">
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
                        <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="goAddPage">添加商品</el-button>
                </el-col>
            </el-row>
            <!-- table表格区域 -->
            <el-table :data="goodsList" style="width: 100%" border stripe>
                <el-table-column type="index" label="#"> </el-table-column>
                <el-table-column prop="goods_name" label="商品名称" > </el-table-column>
                <el-table-column prop="goods_price" label="商品价格" width="95"> </el-table-column>
                <el-table-column prop="goods_weight" label="商品重量" width="70"> </el-table-column>
                <el-table-column prop="add_time" label="创建时间" width="140">
                    <template slot-scope="scope">
                        {{scope.row.add_time|dateFormat}}
                    </template>
                </el-table-column>
                <el-table-column  label="操作" width="130">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.goods_id)"></el-button>
                    </template>
                </el-table-column>
            </el-table>
            <!-- 分页区域 -->
            <el-pagination
              @size-change="handleSizeChange"
              @current-change="handleCurrentChange"
              :current-page="queryInfo.pagenum"
              :page-sizes="[5, 10, 15, 20]"
              :page-size="queryInfo.pagesize"
              layout="total, sizes, prev, pager, next, jumper"
              :total="total">
            </el-pagination>
      </el-card>
    </div>

</template>

<script>
export default {
  data () {
    return {
      // 查询参数
      queryInfo: {
        query: '',
        // 当前页数
        pagenum: 1,
        // 当前条数
        pagesize: 10
      },
      total: 0,
      // 商品分类数据列表
      goodsList: []
    }
  },
  created () {
    this.getGoodsList()
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodsList () {
      const { data: res } = await this.$http.get('goods', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败')
      }
      // this.$message.success('商品分类列表获取成功')
      // console.log(res.data)
      this.total = res.data.total
      this.goodsList = res.data.goods
    },

    // 每页显示多少条数据改变事件
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },

    // 当前显示第几页
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 根据对应的Id删除数据
    async removeById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // console.log(confirmResult)
      // 如果用户点击确定，则返回字符串confirm
      // 如果用户点击取消，则返回字符串cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // 否则就是确定  可以发起请求
      const { data: res } = await this.$http.delete('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败!')
      }

      this.$message.success('删除成功')
      this.getGoodsList()
    },

    // 通过编程式导航去往添加商品页面
    goAddPage () {
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang="less" scoped>

</style>
